蔬菜中农药残留的分散液相微萃取/气相色谱-质谱联用技术快速分析  

Rapid Analysis of Pesticide Residue in Vegetable by Dispersive Liquid-Liquid Microextraction Coupled with GC-MS

作　　者：周敏[1] 李玮[1] 赵凯[1] 王娜[1] 王啸[1] 

机构地区：[1]杭州市质量技术监督检测院,浙江杭州310019

出　　处：《分析测试学报》2010年第9期928-932,共5页Journal of Instrumental Analysis

摘　　要：建立了分散液相微萃取/气相色谱-质谱快速检测蔬菜中农药残留的新方法。对影响萃取和富集效果的因素进行了优化。在优化的实验条件下,10种目标农药的富集倍数达738~895倍,检出限为0.005~0.06 mg/kg,线性范围为0.02~10 mg/kg,相关系数为0.991 2~0.998 7,平均加标回收率为71%~90%,相对标准偏差为3.1%~6.9%。该方法已成功用于蔬菜中10种农药残留的测定。A novel method for the determination of the pesticide in vegetable was developed by dispersive liquid-liquid microextraction（DLLME） coupled with GC-MS.Some important parameters effecting the extraction efficiency,such as the type and volume of extraction,disperser solvent and extraction time,were studied.The result indicated that a good extraction efficiency was obtained by using 1.0 mL acetone as dispersive solvent,10.0 μL chlorobenzene as extraction solvent for extracting 3 min.Under the optimum conditions,the enrichment factors ranged from 738 to 895.The linear ranges of the method for ten target compounds were in the range of 0.02-10 mg/kg with detection limits（S/N=3） of 0.005-0.06 mg/kg.The correlation coefficients were in the range of 0.991 2-0.998 7.The average recoveries of pesticides ranged from 71%to 90% with relative standard deviations of 3.1%-6.9%.The method was successfully used to analyze ten pesticides residues in vegetable samples.

关 键 词：分散液相微萃取 气相色谱-质谱联用 农药残留 蔬菜 

分 类 号：O657.63[理学—分析化学] F767.2[理学—化学]